Activities interact with services and play songs

Activity interacts with the service and plays songs. For convenience, I have fixed the song to be played. You can flexibly improve it.
 

Mservice:

View code

 1 package com.tiantian.test;
 2 
 3 import android.app.Service;
 4 import android.content.Intent;
 5 import android.media.MediaPlayer;
 6 import android.os.Binder;
 7 import android.os.Environment;
 8 import android.os.IBinder;
 9 import android.util.Log;
10 
11 public class MService extends Service{
12     MyBinder myBinder = new MyBinder();
13     private MediaPlayer mediaPlayer;
14     
15     public class MyBinder extends Binder{
16         MService getService(){
17             return MService.this;
18         }
19     }
20     @Override
21     public IBinder onBind(Intent intent) {
22         // TODO Auto-generated method stub
23         Log.v("CAT", "onBind");
24         return myBinder;
25     }
26 
27     @Override
28     public void onCreate() {
29         // TODO Auto-generated method stub
30         super.onCreate();
31         Log.v("CAT", "onCreate");
32         try {
33             mediaPlayer = new MediaPlayer();
34             mediaPlayer.setDataSource(Environment.getExternalStorageDirectory() + "/mp3/trhxn.mp3");
35             mediaPlayer.prepare();
36         } catch (Exception e) {
37             // TODO Auto-generated catch block
38             Log.v("CAT", "fail");
39             e.printStackTrace();
40         } 
41     }
42 
43     @Override
44     public void onDestroy() {
45         // TODO Auto-generated method stub
46         super.onDestroy();
47         Log.v("CAT", "onDestroy");
48     }
49 
50     @Override
51     public int onStartCommand(Intent intent, int flags, int startId) {
52         // TODO Auto-generated method stub
53         Log.v("CAT", "onStartCommand");
54         return super.onStartCommand(intent, flags, startId);
55     }
56 
57     @Override
58     public boolean onUnbind(Intent intent) {
59         // TODO Auto-generated method stub
60         Log.v("CAT", "onUnbind");
61         return false;
62     }
63     
64     public void start(){
65         mediaPlayer.start();
66     }
67     public void pause(){
68         mediaPlayer.pause();
69     }
70     public void stop(){
71         mediaPlayer.stop();
72         mediaPlayer.release();
73     }
74     public int getDuration(){
75         return mediaPlayer.getDuration();
76     }
77     public int getCurrentPosition(){
78         return mediaPlayer.getCurrentPosition();
79     }
80     public void seekTo(int position){
81         mediaPlayer.seekTo(position);
82     }
83 }

Musicplayactivity:

View code

1 package com. Tiantian. test;
2
3 Import Android. App. activity;
4 Import Android. content. componentname;
5 import Android. content. intent;
6 Import Android. content. serviceconnection;
7 Import Android. OS. Bundle;
8 Import Android. OS. Handler;
9 Import Android. OS. ibinder;
10 Import Android. util. log;
11 import Android. View. view;
12 Import Android. View. View. onclicklistener;
13 Import Android. widget. Button;
14 Import Android. widget. seekbar;
15
16 public class musicplayactivity extends activity {
17/** called when the activity is first created .*/
18 mservice;
19 private serviceconnection conn = new serviceconnection (){
20
21 @ override
22 public void onserviceconnected (componentname arg0, ibinder arg1 ){
23 // todo auto-generated method stub
24 mservice = (mservice. mybinder) arg1). getservice ();
25 log. V ("cat", "getserviced ");
26}
27
28 @ override
29 public void onservicedisconnected (componentname name ){
30 // todo auto-generated method stub
31 mservice = NULL;
32}
33
34 };
35
36 private seekbar;
37 private button playbt;
38
39 private Boolean isplaying = false;
40 private Boolean isbinded = false;
41
42 private handler mhandler;
43 @ override
44 public void oncreate (bundle savedinstancestate ){
45 super. oncreate (savedinstancestate );
46 setcontentview (R. layout. Main );
47 intent = new intent (musicplayactivity. This, mservice. Class );
48 if (! Isbinded ){
49 bindservice (intent, Conn, bind_auto_create );
50 isbinded = true;
51}
52 seekbar = (seekbar) findviewbyid (R. Id. seekbar );
53 playbt = (button) findviewbyid (R. Id. startbt );
54 mhandler = new handler ();
55 seekbar. setonseekbarchangelistener (New seekbar. onseekbarchangelistener (){
56
57 @ override
58 public void onstoptrackingtouch (seekbar ){}
59
60 @ override
61 Public void onstarttrackingtouch (seekbar ){}
62
63 @ override
64 public void onprogresschanged (seekbar, int progress,
65 Boolean fromuser ){
66 If (fromuser ){
67 mservice. seekto (Progress SS * mservice. getduration ()/100 );
68}
69}
70 });
71 playbt. setonclicklistener (New onclicklistener (){
72
73 @ override
74 public void onclick (view v ){
75 // todo auto-generated method stub
76 if (! Isplaying ){
77 mservice. Start ();
78 isplaying = true;
79 playbt. settext ("paused ");
80 mhandler. Post (seek1_read );
81} else {
82 mservice. Pause ();
83 isplaying = false;
84 playbt. settext ("play ");
85 mhandler. removecallbacks (seek1_read );
86}
87}
88 });
89
90}
91
92 runnable seek1_read = new runnable (){
93
94 @ override
95 public void run (){
96 // todo auto-generated method stub
97 seekbar. setprogress (mservice. getcurrentposition () * 100)/mservice. getduration ());
98 mhandler. postdelayed (seekreceivread, 200 );
99}
100 };
101
102}